Q.

A 20 mL sample of vinegar of density 1.06 g/cc requires 43 mL of 0.40 N NaOH  for complete neutralization. The percentage by weight of acetic acid,CH3COOH  , in the vinegar is_____.

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answer is 4.83.

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Detailed Solution

20×MCH3COOH=43×0.4

20×10×x×d60=43×0.4

20×10×x×1.0660=43×0.4x=4.867

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